Loop wheel of circular-knitting frames



July 20 ,1926. X 1,593,463

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GJMSEPPE MGRH July 201926. 1,593,463

a. NIGRA LOOP WHEEL OF CIRCULAR KNITTING FRAIES Filed Dec. 10. 1924 2Sheets-Sheet 2 I 3min? jmss s MGRH Patented July 20, 1926,

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seer sat fiesan as Fee -WE Application filed December 5 ra us loflthe-frame, difficulty has been are in o raasi e the sinker durrefQ it b jor the 6 p vhs Wi l m- 'ive1y',. nq db nflb w' w d a en iee es ipeatathe h ead ou t u hr its t realism a P in and W th y' that mightinjurethe hr a a I A re.w ms 1 ...sev ra em er m be-$9..a es@d t .Whiltsinke a successively caused by'th'e' cam to, move down between twoadjacent needles,th'ey"will'substantiallybe placed parallel to thelatter and at 'ediia'l' distances apart therefrom. The termsubstantially parallel is used because the needles in fact are radial,i. e. not parallel to each other.

The requirement above referred to may be obtained in two different ways:

(1) By arranging the needles upon the rotary plate or drum of the frameat an angle with respect to the radii of said drum, and by so arrangingthe sinkers in the loop wheel as to form a sort of cylinder or truncatedcone, say, by placing them in planes passing through the axis of theloop wheel.

(2) By keeping the needles radial upon the frame, as in usual frames,and by suitably inclining the sinkers in the loop wheel with respect tothe generating lines of the loop wheel itself.

The invention has for its object an em bodiment of loop wheel accordingto the last mentioned system.

Loop wheels according to the invention substantially consist, asdescribed in the copending patent application Serial No. 740,090, filedSept. 26, 1924, for improvements in the loop wheels of circular knitting frames, of a guide plate or disc and a notched disc or comb, bothturning synchronously with the loop wheel shaft, and carrying thesinkers therewith. According to the present invention the sinkers are nolonger in planes passing through the axis of rotation, but they are inplanes inclined with respect to the latter, and said planes crosstherefore the faces of the guide plate andcomb, which are parallel toeach other, at an angle other than a right angle.

The invention is illustrated in the accom- 19, 934. Serial n), 755,007.

panying drawing,inwhich Figure 1 is a horizontal view and Figure 2 a avertical rear view of a loop wheel as'applie'tl to a circular frame. 'f

The frame, which isshown for explanatory purposes only", and forinsnopartbf the invention, comprises a j vertical; shaft 1 (Figure 2)'supportiiig by 'nieansjofradial arm's ,2, preferably flanged as at 2 a'LfiXed platform 3. Albracket 2 2, suit'ablyattached thereto," carriesby itsvertical"'depending arm 23 one of the ends of'thje floop fwheel.shaft 13, the opposite end thereof I being suitably supported at 24b'y'menis of'another dependingarm (not interned) 'froin" the saidplatform. w

4 is'the rotary plate or drum of the frame, the needles'b" being'ra'diallyarr'anged"upon, and projecting from around, the edge thereof.In Figure 2 the needles are shown by a horizontal dotted line.

A toothed driving wheel 14 is suitably fixed to the loop wheel shaft 13,near its in ner end, said wheel 14 meshing with a circular rack 15 onthe upper face of the rotary plate or drum of the frame, to drive theloop wheel. The latter comprises the notched disc or comb 17 and theguide plate 18, which control the up and down movements of the sinkers16, as described in the previous specification above mentioned. 20 and21 are the positioning springs, as described in the co-pending' patentapplication Serial No. 740,091, filed September 26, 1924, forimprovements in the loop wheels of circular knitting frames 25 are theknocking over platines vertically arranged around the drum 4 and adaptedto knock down the loops from the needles over the thread to form thestitches.

As shown in Fig. 2, the sinkers, consisting as usual of small sheetmetal plates, are not in planes passing through the axis of rotation ofthe loop wheel, but in planes inclined with respect to the said axis.For instance, A B shows the trace of the plane of one sinker over theplane C D (Figure 1) tangential to the tails of the sinkers.

The inclination of such planes with respect to the faces of either guideplate and comb is substantially as shown in Figure 1, wherein thereferences 16 16 16 denote the traces of the planes of the fivelowermost sinkers over the horizontal needle plane 5 (Figure 2).

In order to comply with such inclination and to maintain the sinkers intheir normal positions during their rocking movement, the comb shouldnecessarily be provided with correspondingly inclined notches, and thegrooves in the front edge of guide plate should be similarly inclined toguide the tails of the sinke'rs. The angle of inclination of the traces16 (Figure 2), say the radius of the circle, which the several traces AB are tangential to, is so determined that the sinkers, which in turnmove down between two adjacent needles, will substan tially be in themiddle plane thereof.

As an illustration, it may be stated that for given sizes of frame andloop wheel. and for a given inclination of the axis X Y (Figure 1) withrespect to the needles in the frame drum, it has been found advisable tomake the planes of the sinkers cross the axis of rotation of the loopwheel at M, say where the said axis crosses the middle plane L N of thecomb edge. This indication is given by way of example only, as it willeasily be understood that the crossing pointreferred to will vary whenany of the mentioned conditions are modified.

hat I claim as my invention is 1. In a knitting machine of the typedescribed, a loop wheel comprising a comb, a guide disk spaced from thecomb and zarallel therewith and rocking sinkers mounted in the comb andhaving their tails engaging the guide disk at a point at one side of apoint directly opposite the connection of the sinkers with the comb,whereby the sinkers will extend diagonally across the comb and guidedisk and lie in planes inclined to the axis of the loop wheel.

2. In a knitting machine of the type described, a loop wheel comprisinga comb having notches inclined to its axis, a guide disk spaced from thecomb and parallel therewith, and rocking sinkers mounted in the notchesof the comb and having their tails provided with notches engaging theperiphery of the guide disk. whereby the sinkers will extend diagonallyacross the comb and guide disk and lie in planes inclined to the axis ofthe loop wheel.

In witness whereof, I have hereunto signed my name.

GTUSEPPE NIGRA.

